I'm going to say third trimester for the reason that when most baby's are born their heads come out first in most cases. For the most part, they travel down the birth canal head first. If that doesn't happy the doctor tries to position the baby so that it won't be a breached birth meaning the legs come out first. By the head coming out first the baby is able to have an air supply where as with a breached birth that doesn't happen.
Hopefully this helped and good luck.
Positive, as technology can be used to measure mortility rates and health, used to identify and develop a diagnosis, and used to moniter patients which helps them live. More ordinary people have access to information which will help them in medical emergencies, such as strokes. Moreover, technology increases the chances of successful treatment
<span>A monthly budget would allow Damian to save
enough money considering that when the total amount is to be divided by 24
months (2 years), the amount will not be very much heavy for him. The amount
that has to be saved up by Damian every month should be at least $300. </span>
Answer:
Explanation:
It won't be useful in the same way that knowing how a car works helps you fix it when it breaks down. It can help us understand how nature works and how its processes work. We learn about global warming and what we can do to try and prevent it. We learn about alternative energy sources and why it is all dangerous to forget about.
Answer:
Explanation:
Forehand groundstroke effectiveness is important for tennis success. Ball topspin angular velocity (TAV) and accuracy are important for fore hand groundstroke effectiveness, and have been extensively studied, previously; despite previous, quality studies, it was unclear whether certain racquet kinematics relate to ball TAV and shot accuracy during the forehand groundstroke. This study evaluated potential relationships between (1) ball TAV and (2) forehand accuracy, and five measures of racquet kinematics: racquet head impact angle (i.e., closed or open face), horizontal and vertical racquet head velocity before impact, racquet head trajectory (resultant velocity direction, relative to horizontal) before impact, and hitting zone length (quasi-linear displacement, immediately before and after impact). Thirteen collegiate-level tennis players hit forehand groundstrokes in a biomechanics laboratory, where racquet kinematics and ball TAV were measured, and on a tennis court, to assess accuracy. Correlational statistics were used to evaluate potential relationships between racquet kinematics, and ball TAV (mixed model) and forehand accuracy (between-subjects model; α = 0.05). We observed an average (1) racquet head impact angle, (2) racquet head trajectory before impact, relative to horizontal, (3) racquet head horizontal velocity before impact, (4) racquet head vertical velocity before impact, and (5) hitting zone length of 80.4 ± 3.6˚, 18.6 ± 4.3˚, 15.4 ± 1.4 m·s-1, 6.6 ± 2.2 m·s-1, and 79.8 ± 8.6 mm, respectively; and an average ball TAV of 969 ± 375 revolutions per minute. Only racquet head impact angle and racquet head vertical velocity, before impact, significantly correlated with ball TAV (p < 0.01). None of the observed racquet kinematics significantly correlated to the measures of forehand accuracy. These results confirmed mechanical logic and indicate that increased ball TAV is associated with a more closed racquet head impact angle (ranging from 70 to 85˚, relative to the ground) and increased racquet head vertical velocity before impact.
